https://www.google.com/aclk?sa=l&ai=DChcSEwi3qsSFiOrPAhVGgX4KHbgwDNAYABAs&sig=AOD64_13U1ISBpYSxcvQzoJ55NvxQ-yJqw&ctype=5&q=&ved=0ahUKEwimk8KFiOrPAhWl0FQKHaFRC0UQ2CkImQMwDQ&adurl=
These are what I have been using.
They are hard as a coffin nail, but long lasting.
When I say hard, I mean...
Oh, 7/16ths. My brain saw 7/8ths for some reason!
Yeah, any old oil would work for that. I have used motor oil before.
I like the split point bits, but what ever you use dont drill to large a pilot hole. I would do a quarter first.
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